Heater



Sept. 4, 1928. 1,683,082

L. s. LAwsoN HEATER Filed Oct. 10, r1924 4 Sheets-Sheet 1 OOOOOOOOOOOOOQOO WHA/5555s Sept. 4, 1928.

L. S. LAWSON HEATER 4 Sheets-sheet Filed Oct. 10, 1924 Sept. 4, 1928.

L. s. LAWSON HEATER Filed OGb. 10, 1924 wlw/5.5355 D Fatentetl Sept. d, 1928.

Unirse stata-s? L? Las Partnr Iorific LINDLEY S. LAW'SON, 0F PITTSBURCE, PENNSYLVANIA, ASSIG'NOR` TO LAWSON MANU- FACTURING CGMPANY, OF

` PENNSYLVANIA.

ETTSBU'EtGI ENNSYLVANA, A. CORPORATION OF HEATER.

Appli-cation filed October 10, 1924. Serial No. 742,821.

T hs invention relates to stoves and more Vparticularly to the typeA known as radiant heaters. y

An object of the present invention is to provide a device of the type set forth in which the elements are so constructed and arranged that more perfect combustion ofthe gas isy ohtained than has heretofore been possible.

Stoves of the type setforth have heretofore been provided wit-h a metal shield across the bottoni of the stove below the burner for the purpose of overcoming any danger of ignit-V ing the floor or supporton which the stove was mounted, due to the passage of heat downwardly. Such shields have been provided so as to comply with the requirements of the fire underwritersq A further object of this invention is to provide a stove which is so constructed and arranged that all necessity for such aI shield is eliminated and which at'the same time coin plies with all requirements of said. underwriters. A

A still further object is to provide a new means for supporting the radiants without the usual bail across the tops thereof, so as to render them easily removable for cleaning and repairing.

A still further object is to produce a construction which will provide ample secondary airfor combustion purposes.

A still further object is to provide a heater of the type set forth which Jwill be simple and cheap to manufacture and assemble, rugged in construction `and highly efficient in operation.

These and other objects which will be apparent to those skilled in this particular art are attained by means of this invention, one embodiment of which is shown in the accompanying drawings, in which Figure 1 is a front elevation, partly in vertical section, of

one form of apparatus constructed in ac# cordance with this invention. Fig. 2 is a vertical cross section on the line 2 2 of Fig. 1. Fig. 3 is a similar view on an enlarged scale showing the burner and associated structure. Fig. f1 is a horizontal cross section on the line 4 1r-4 of 2. Fig. 5 is a similar view on an enlarged scale with certain of the elements removed. 6 1s a top plan view of one end of the heater. Fig. is a longitudinal section yon the line 7-7 of k6, Vwhile Figs. 8 and 9 are transverse sections on the lines 8 and 9-9, respectively, of Fig. 6. i

The particular embodiment of this invention which has been chosen for the purposes of illustration includes a front' casting A1() whichis suitably mounted upon front supporting legsll. yThe legs 11 are detachable so that any forin or design thereof Amay be used- The sides and back of the stove are formed by a sheet metal housing 12, the lower front sections 13 of which', see Fig. 2, are rigidly secured to the casting 10. The Vrear legs llll: of the stove have vertically extending angles 15 which embrace and support the rear corners of the housing 12 and the housing is rigidly held in position-by means of inner` angle pieces 16 which t within the corners of the housing and cooperate with the angles15 so asto clamp the corners of the housing between them through tlie medium of bolts or similar devices.v

Each angle piece 16 is provided at its top with ahorizontally extending shelf or plate V17 which plates cooperate to forni spaced supports for 'a iire back 18 which is provided with the usual series of openings 19 adjacent the top thereof for the escape of iue gases. L-shaped spacers 19, formed of sheet metal, are provided between each corner. of the housing andthe adjacent corner of the lire back for V.maintaining the latter in proper 85 position. These spacers, being` of sheet metal, are

yieldable and automatically compensate for the difference in expansion between the lire back and the frame 12. 'solas lto holdthe is held in proper position by angles 22` which are secured thereto and which engage the housing 12 on one side and the iire back 14 on the other. The top of the partition 21 has a horizontal, forwardly extending leg 23 whichr contacts with the top surface of the fire back 18. The'leg 23 is bent backward 60 diant and communicates with one ofthe open# upon itself so as to form a'yielding surface 24 for a purpose to be described. A iue25 1s mounted in the partitionl 21 and extendsl through a suitable opening 26 in the housing 12 sonas to provide a means of escape forthe flue gases rising through the openings`19 at thegtop ofthe lire back. It will be apparent that a, heat insulating air chamberi27 is formed' by the fire back 18, the partition 21 with its liange 23, and the spacers 19 so that there is no outlet for the flue gasesfrom the stove,` except `throughr the proper passage, namely, the Vflue A dead air space 27 is also thus `formed which acts as a heat'insulator Vand prevents radiation of heat `from the back and top ofthe stove@ u A burner 28 is -rigidly'mounted on Vthe bottom of theV shelves 17 by means of screws" 29 or similar devices and parallel to thefire back 18. The burner is provided with laterallyextending arms or flanges 3() whichform an eili-V clent means for `preventing the escape or radiation of heat downwardly past the burner and eliminates all danger of lire risk without the necessity of the metal shieldheretofore generally employedin stoves of this type. By

mounting the ireback upon the spaced supporting plates or shelves 17 practically the en'- tire length of thebottom face thereof is free of any any obstruction and the burner is' so supported `from the shelves 17 and soflocated with relation tof the bottom faceof the fire back that a space 31 of substantial width is in'their topV faces, there being oney lu in front of each set of gas nozzles `34. A radiant 35is supported on each lug over each set Vof gas nozzles Vand the bottom front edge of each radiant has a notch 36 which seats within the notch V33 in thesuppo'rting lug so as to hold each radiant in proper position. V `Each lug is ofsuch heightthat the radiants aresupported in spaced relationto the burner so as to provide aspace' around the bottom of each 'radiantforf the' admission of secondary air which 1s drawn throughthe space between the fire` back andtheburnerand into each radiant above the gas nozzles.` Anotch 37 is formedinthe bottom rear edge of each radiant to render themeasifly removable as hereinafterde'scribed. Each radiant has anup ie wardly extending flange 38 which engagest back 'n front of rear of a shoulder 39fformed in the forwardlyV extending overhanving portion of the fire each opening'19. An opening 40 is 'formed in the back wall 4of eachraings V19 of the freback for the escape of the flue 'gases. A 'i By supporting the; radiants inthis manner thev removal of the individual radiants from theheater and their replacement is materially simplified." -For example, in order to remove aradiant fromtlie stove git-is only necessary to lift it vertically so as to free the notch 36 from the lug 32 after which the lowerV end of the radiant may beswungforwardly and the element removed. f In swinging .the

lower end forward the notch 3:7 passes over thelug 32. In replacingthe radiantsthe reverse operation is easily accomplished.

The forward vertical edges ofthe housin 12 lit within pillars 41 which are supporte v `upon the casting 10- and maybe of any desired form or design. A vertically extending back 42 is mounted uponthe top of the housing 12 and is securely heldin position by means of a stove top 43'which is fastened to the back and which has i forwardly projecting lugs 44, see

Figr8, seating within the pillars 41 to which they are secured by from'finials 41. i i

means of bolts depending Y.

`As above :described Vthe forwardly eXtendl support 24, This support is arched as Vshown in Fig. 7 and thelstove top 43`is provided with flanges 45 which press upon the ing leg`23 of the-partition 21 is bent backf "wardlyL4 so as to form a yieldingsurface or 50 yielding support 24. Betvsfeen the lianges45 the support 24'V yieldingly and directly-err.A

gages the inner face `of the top. 43.` This construction results in a rigid Vstructure which at "thelsame time isfada tedtoyield asa result of the dill'erences in t e coeiicients of expan- I sion of the fire-back and the metal parts. .`-As above describedthe L-shaped spacers 19, be-V ing made of sheet metal, are also adapted to l yieldf underthe same influer-ice.`

no'peration `the eombs'uo'n ,ofthe gas is made completebythe plentiful supply of secondary air which` is freely admittedtoA eachV radiant through thel space betweenthe bottoms thereof and theburner platefas above i described. The radiante yare accordingl heated to a high 4degree of incandescencewit thefresult that the'utmost heatipossibleis obtainedffrom the stove for a 'given'amount of gas. AThe products ofcombustion escape through 4'thefflue 25.` Although'no fire shield i is provided across the bottom of thest'ove i all dangerofigniting the licor as a result of the downwardescape of heat iseliminatedby the flanges 30. l

Although I have described and illustrated a i particular embodiment ofthis invention, I

Vdo not wishto be limited to the speciiic'details thereof, butwhat I claim as new and desire to secure by `Letter`sPatent is i' i 1. The `combinationina gas heater ofl a fire back," a burner located in front of said lire back, radiants supported ino erative porting said fire back and saidburnerlocated at each end thereoi.`V 2. The combination ina heater of a front memberya sheet jinetal housing connected 125,- `relation to said burner `and meansN or suptherewith, means for supporting the rear :of said housing, burn er, a lire back and shelves on said supporting meas tor supporting said fire back and said burner. 1

3. The combination in a heater oit a liront member, a sheet metal housing connected therewith, supports for said housing engaging the rear corners thercot, angle pieces engaging said corners and cooperating with said supports to rigidly hold said housing, a burner, a lire back and asheli on each of 'said angle pieces providing spaced supports for supporting said lire back and said burner. rlhe combination in a gas heater of a `front member, a sheet metal housing connected therewith, supports for said housing'enng the rear corners thereof, braces engaging said corners and cooperating with said supports to rigidly hold said housing, a

burner, a lire back, and means on said braces for supporting said lire back and said burner. 5. The combination in a gas heater, oit a fire back, radiaiits mounted in iront of said fire back and a burner located in opeiative relation to said radiants and provided with means for preventing the radiation ot' heat downwardly past said burner.

6. Tho'combinatioii in a gas heater, oi a fire back, radiants mounted in iront ot said tire back and a burner located in operative relation to said radiante and provided with horizontally extending flanges for preventing the radiation of heat downwardly past said burner. r

7. The combination in a gas heater, ot a front member, a sheet metal housing, a tire back supported within said housing, spacers between said tire back and said housing and a partition engaging said spacers and cooperating with said lire bach so as to vtorm a flue tor the escape or' gases.

8. The combination in a gas heater, of a iront member, a sheet metal housing, a tire back supported within said housing, yielding spacers between said lire back and said housing and a partition engaging said spacers and cooperating with said lire bach to ornfi a lue for the escape of gases.

9. The combination in a gasheater, ot a iront member, a sheet metal housing, a tire back supported within said housing, giooved yielding spacers between said tire bach` and said housing and a partitionhaving its edges engaging the grooves ot said spacers and cooperating with said tire back to form a flue for the escape oi gases and i 7ith said housing to form a heat insulating air space.

10. The combination in a gasheater, of a iront member, a sheet metal housing, a lire back supported within said housing, yielding spacers between said lire baci: and said housing, a partition engaging said spacers and contacting with the top of said lire back so as to :torni a heat insulating chamber therebetween, a flue outlet secured to Aaid partition' and extending through said housing and meansr for yieldingly pressing saidpartition Vinto contact with the topo't said tire back.v

.openings inv the top or' said lire bach, a parti- VYtion engaging said spacers and cooperating with said lire back to form a fiue for the escape oi gases, a i'iange on said partition ci; tending over said tire baclr and means tor yieldingly. pressing said iiange into 'engagenient with the top of said tire back so as to `torni a heat insulating chamber therebetween.

l2. The 'combination iii a gas heater, oi'a burner provided. with a plurality of spaced lugs each having a notch in the upper surfacev thereoi and radiants supported on said burner and provided with apertures adapted to cooperate with saidnotches i'or 'positioning said radiante. f 1

13. The combination iii a gas heater, of a lire back, having shoulders across the top thereof, a burner mounted in iront of said lire back and provided with a pluiality of spaced lugs, radiante having shoulder engaging `iianges adapted to be supported iii front of said lire back on said lugs and to be liftedvertically for removal therefrom.

14. rl`he combination in a gas heater, of a iire back, having shoulders across the top thereof, a burner mounted in liront of said fire back provided with a plurality ot sets of nozzles, a lug in front oi each set ot nozzles, having a notch in the top tace thereof, a radiant provided with a shoulder engaging flange at the top thereof and a notch in its bottom edge adapted to cooperate with the notch in4 said lug tor supporting said radiant in spaced relation to said burner.

V15. llhe combination in 'a gas heater oi' a burner providedr with a plurality of sets ot gas nozzles, a vradiant associated `with each set or' nozzles and a radiant supporting lug on said burner in front ot each set of nozzles for supporting the associated radiant in spaced relation to said burner. n

i6. The combination in a gas heater of a burner provided with a plurality ot' sets of gas nozzles, a radiant associated with each set oi nozzles and a radiant supporting lug projecting above each set of nozzles forr supporting the associated radiant in spaced relation to said burnerv l 17. The combination in a gas heater of a burner provided with a plurality of gas nozzles, radiants associated therewith, radiant supporting lugs on said burner in front of V tinuous passage below said Afirehaek` for the f admission of secondary air ,to said radiants.

l zles, radiants associated therewith, radiant rear thereof forfacilitating removal fromv supporting lugson said burner in frontof said nozzlcsforsupporting saidradiants and arnotch in the bottom of each radiant at the said burner. f l

19. The 4conahimation5in a gas heater of. a burner, radiante, means for supporting said radiants` on said burner, afireback and spaced vsupports for holdingboth said rebackland said burner arranged so `as to provide-a con- 20. The combination in` a gas heater of, a fireback,a burner located rinfront. of said rehack,` radiante positioned in operative relation to said burner and spaced means for supporting both said ireback and said burner.

21. The combination ina gas heater of a housing, a burnerl mounted Within said hous-V ing, a fireback associatedwith said burner, a

Y partition spaced lfrom the rear of said re- `back and provided with an extension along Ithetop thereof and means for pressing said extension into engagement fwith the top "of saidlirehack.` A 1 22. The combination in afgasheater offa housing; a! burner "mounted within said'hous ing, a Vfireloack associatedwith said burner, a

partition 'spaced' from the rear of `said ireback and provided Wit-h a forwardly projecting flange along'tlieytop thereof andnieans for yieldnglypressing said flange intoV en- 40'` 23.` The lcombination ina gas heater ofa v gagement with thetop of said freback housing, a' stove top mountedk thereomf'a partitionspaced from the rear fof said fire back and provided with afforwardly pro Vburner mountedfin said housing, a fireback.

associated with 4said burner, a. sheetinetal` i f1 jecting iangeextending over the top Ofsaid i ireback, saiddiangehavin I a 4hackvvardly bent portion forming ayiel ingsurface and Hang/es on said stove top `for engaging said 'yielding suracesoV as to press said forwardly projecting flange intoengagernent with said fireback.

o `In testimonyvvhereof; lIl harve hereunto scribed `my name, this 4th day of October,

1924.V 3 r r TLiNDLEY As. LAWSON. 

